0,75+(-4/5)= (-0,2)+1/7= 0,3+(-5/6)= (-1,8)+7/8=
0,75+(–4/5)=0,75+(-0,8)=-0,05 (–0,2)+1/7=(-1/5)+(1/7)=(-7/35)+(5/35)=-2/35 0,3+(–5/6)=(3/10)+(-5/6)=(9/30)+(-25/30)=(-16/30)=(-8/15) (–1,8)+7/8=(-9/5)+(7/8)=(-72/40)+(35/40)=(-37/40)